Abstract A new Z-scheme T i O 2 / g - C 3 N 4 / B i 2 W O 6 ternary heterojunction has been successfully synthesized through a simple hydrothermal method. As-fabricated ternary heterojunction could exhibit enhanced photocatalytic activities in Rh B, MB and phenol using visible light irradiation than those from T i O 2 , g - C 3 N 4 , B i 2 W O 6 nanostructures and g - C 3 N 4 / B i 2 W O 6 heterojunction. These improved photocatalytic activities were mainly because of the decrease on the recombination of photo excited hole-electron pairs, thus enhancing the lifetime of photo induced charge carrier in a Z-scheme heterojunction. Furthermore, the combined action of ·OH, ·O2, h+ and e− active species effectively promoted the photocatalytic process, which made the ternary heterojunction having low selectivity to the photo-degradation of different organic pollutants. After the fifth cyclic utilization of the ternary heterojunction, the degradation rate of Rh B, MB and phenol could be still reached to 91%, 78% and 63%, respectively. This illustrates that the obtained heterojunction has enhanced visible light photocatalytic efficacy including low selectivity and high activity with excellent stability for practical purposes.

中文翻译：

---

新型 Z 型 TiO2/g-C3N4/Bi2WO6 异质结在可见光下的增强光催化特性和低选择性

摘要 通过简单的水热法成功合成了一种新的Z型T i O 2 / g - C 3 N 4 / B i 2 WO 6 三元异质结。与来自 T i O 2 、g - C 3 N 4 、B i 2 WO 6 纳米结构和 g - C 3 N 4 / 的三元异质结相比，制造的三元异质结在可见光照射下可以在 Rh B、MB 和苯酚中表现出更高的光催化活性B i 2 WO 6 异质结。这些改进的光催化活性主要是因为光激发的空穴-电子对的复合减少，从而提高了 Z 型异质结中光致电荷载流子的寿命。此外，·OH、·O2、h+和e-活性物质的共同作用有效地促进了光催化过程，这使得三元异质结对不同有机污染物的光降解选择性较低。三元异质结经过第五次循环利用后，Rh B、MB和苯酚的降解率仍可分别达到91%、78%和63%。这说明所获得的异质结具有增强的可见光光催化功效，包括低选择性和高活性，并且具有优异的实用稳定性。